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(No Model.)

- Smeetssheet 1. C. HALL 8a J. YOUNG.

BOLTl MACHINE.

No. 311,642. Patented Mayu, 1885.`

n. PETERS Phowumngnpw. wuungm n.1;

'(No Model.)

3 Sheets-Sheet 2.

o. HALL an J. YOUNG.

BOLT MACHINE.

Patented May 12, 1885.

N. PETERS Pnmumegnphu. wnhmpm. nr;

` (No Model.) l I 3 Sheets-Sheet' 3.

G. HALL 8u J. YOUNG.

BOLT MACHINE. No. 317,642. Patented May 12, 1885.

jim Y M M NITED STATES PATENT Orifice.

CHARLES HALL, NEWf YORK, NQY., AND JOHN YOUNG, OF NE\\"'ARK, NEV JERSEY, ASSIGNORS TO SATD CHARLES HALL.

BOLT-MACHINE.

SPECIFICATION forming part of Letters Patent No. 317,642, dated May 12,1885.

A pplicaiion filed Fibruary 'l. IESS. (No niolel.)

To aN whom it may concern:

Be it known that we, CHARLES HALL, of the city and State of New York, and Jol-IN YOUNG, of Newark, in the county of Essex and State of New Jersey, have invented an Improvement in Bolt-Machines, of which the following is a specification.

Bolt-machines have heretofore been made in which the main shaft revolves once for each io blow that is struck upon the bolt-head. In

practice it is found that machines of this character cannot be driven at ahigh speed, because of the concussion to which the respective parts are subjected. Some of these parts are necessarily heavy, and their momentum under high rates of speed causes the parts to be broken, strained, or injured, or the smaller parts of the machine to become bent or displaced.

Our improvements are intended to obviate the aforesaid difficulties; and such improvements relate to the peculiarities of construction hereinafter described, and to the combinations of devices.

In the drawings, Figure lis a plan view of the bolt-machine. Fig. 2 is a side elevation with the dash-pot in section; and Fig. 3 is a vertical longitudinal section at the line m, Fig. l.

The frame A is supported on suitable legs or cross-frames, B, and C C are the pillowblocks for the main shaft D. This shaft D is provided with fiy-wheels E, and it is driven by competent power.

G is a bearing-block containing the die G', which is within a recess in said block, and secured by a bolt, g.

His a swinging head-block, supported by a shaft, H', that passes through the cross .1,0 pieces 'A2 A3 of the frame. The upper end of this swinging head-block is recessed for the reception of the clamping-die H2, that isheld in place by the screw-bolt h, and there is an arm, H, projecting laterally from the swing- 45 ing head-block and extending out over the lever K. This lever K is pivoted at 7c, and the moving end thereof is above the main shaft D, at which place a double cam, L, is applied to such :main shaft D. The under 5o surface of the lever K is the are ofa circle,

against which the cams L aci, and there is be tween the lever K and thc projecting arm H a thrust-piece with studs at opposite sides entering into recesses in the lever K and arm H3, respectively. This thrust-piece M, being preferably in the form of a ring, will break and prevent injury to the other parts of the nia chine in case of any obstruction to the proper movements of the swinging head block H. This thrust-piece may be either straight or curved. There is alink-pieee, M', that connects the arm H and lever K. lt is slotted, as shown, so that the thrust is taken entirely upon the piece M. A pistoirrod, N, is connected at its upper end to the lever K, and e5 passes down to a piston in the dash-pot N',

which dash-pot may be provided with jaws at its lower end, by which it is hinged to an arm that projects laterally from one ot the crossframes B; or the dash-pot may be bolted to the frame and ajoint be made in the piston rod N.

At the high rate of speed at which it is advantageous to drive these boltlheading ma'- chines, the lever K nieves up and down quite 75 rapidly, and being of necessity a heavy casting the momentum and inertia are liable to produce injury to the cams and to the surface of the le ver with which the cams comein contact. This dash-pot, preferably, being double acting, the confined air at both the top and bottom of the stroke acts to cushion the piston and overcome the momentum and inertia of the lever K,and preventinjury orthumping of the lever. This dash'pot may be single acting, if preferred.

The cams L may be made as one with the shaft D, or they may be separate pieces movably connected with the sha-ft, so as to bere moved and renewed when worn too much.

The heading-dic O is secured withinastoek, 9o

' est part of the cam first comes into contact with such shoe, and the motion is commenced slow, and the point of contact between the cams and bearing-block descends and the stroke is iinished with the parts in line,or nearly so. As the shaft D is revolved rapidly these cams S act successively against the bearing-block Q n upon the stock O', and the heading-die is thereby reciprocated rapidly. The work man passes a highly-heated rod or bar in between thel clamp or dies G H2, and these dies come up and hold said rod immediately before the heading-die O strikes a blow upon the end ofthe rod to upset and head the same. As the jaws G H2 open the workman gives to the said rod a quarter or one-sixth of a revolutiomand the heading operation is repeated until either a four or a six sided head is formed between the said dies G H2.

In consequence of the shaft D being made broad between the frames and receiving the separate cams S, we are able to obtain a rapid reciprocation of the heading-die with a comparatively slow rotation of the shaft D,and the cams S being separate and at some distance from each other the necessary time intervenes for the return of the heading-die between the action of one cam S and the next, and the parts are not injured by the concussion or thumping action due to inertia. There is an adjustable bearing-frame,T,having an inclined face adjacent to the swinging head-block H, against which the said head-block presses while the heading-die strikes its blow against the bolt.

At one cornerof the frame A is aprojection,

U, to which is bolted a bedshear,U, and the swinging shear-lever U2 is pivotedatU3 upon one side of the frame A, and there isacam or eccentric, U, upon the shaft D, by which this shear-lever is moved, so that the workmen can cut off each bolt, after the head has been forged,by placing such bolt upon the bed-shear and beneath the cutter at the end of the shearlever.

XVe claim as our invention- 1. The combination, with the heading-die and its stock in a bolt-machine, of a bearing` block attached to such reciprocating stock, the shaft D, that is made broad between the supporting pillow-blocks C, and the two movable cams S, secured within recesses at opposite sides of such shaft D, substantially as set forth.

2. The combination, in a bolt-machine, of the swinging head-block H, having a lateral arm, H", the lever K, pivoted to the frame A, the thrust-piece M, between the lever K and the arm Hand the two cams Lupon the shaft D, acting upon the lever K, substantially as set forth.

3. In a bolt-heading machine, the combination,with the sWinginghead-block H, lever K, and the two cams L, of the dash-pot, a piston within that dash-pot, and a rod connecting the piston to the lever K, and a hinge uniting the dash-pot tothe frame,substantially as set forth.

4. lhe co1nbination,with the movable headblock in a bolt-machine, of the lever to move the same, the main shaft and its cam, and a dash-pot, and a connection from the piston to the lever, substantially as set'forth.

Signed by us this 9th day of February, A. D. 1885.

CHAS. HALL. JOHN YOUNG.

\Vitnesses:

GEO. T. PINCKNEY, WILLIAM G. Mo'r'r. 

